High-voltage box control device and method

Abstract

The invention provides a high-voltage box control device and method. Comprising a first Hall sensor, a second Hall sensor and a control module, the first Hall sensor is respectively connected with the control module and a battery cluster main loop of the high-voltage box, and is used for sending a collected first current value of the battery cluster main loop to the control module; the second Hall sensor is respectively connected with the control module and the battery cluster main loop and is used for sending a collected second current value of the battery cluster main loop to the control module; and the control module is used for executing on-off operation on the high-voltage box according to the first current value and the second current value. According to the technical scheme, the problem of damage to the high-voltage box caused by inaccurate current acquisition or fault of the current acquisition device is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of energy storage systems, and in particular to a high-voltage box control device and method. Background Art

[0002] The high-voltage box is the management unit of the battery cluster's main electrical circuit, providing the energy storage system with a battery cluster status monitoring function. Current acquisition detection is an important part of the high-voltage box's management of battery cluster charging and discharging, and it plays a decisive role in the safe application of energy storage battery packs when used in groups and the extension of their life.

[0003] The electrical main circuit of the high-voltage box in the prior art mainly uses a single shunt or a single Hall sensor to collect the current of the battery cluster, so as to complete the state monitoring function of the energy storage system on the battery cluster.

[0004] However, the circuit operation safety of the above-mentioned high-voltage box electrical main circuit is relatively low. Summary of the invention

[0005] The present application provides a high-voltage box control device and method, which are used to solve the problem of low circuit operation safety of the electrical main circuit of a traditional high-voltage box.

[0006] In a first aspect, the present application provides a high-voltage box control device, comprising:

[0007] A first Hall sensor, a second Hall sensor and a control module;

[0008] The first Hall sensor is connected to the control module and the battery cluster main circuit of the high-voltage box respectively, and is used to send the collected first current value of the battery cluster main circuit to the control module;

[0009] The second Hall sensor is connected to the control module and the main circuit of the battery cluster respectively, and is used to send the collected second current value of the main circuit of the battery cluster to the control module;

[0010] The control module is used to perform an on-off operation on the high voltage box according to the first current value and the second current value.

[0011] Optionally, the control module is specifically used for:

[0012] Calculate a current difference between the first current value and the second current value;

[0013] If the current difference is less than or equal to the preset current difference, the circuit breaker in the main circuit of the control battery cluster is in a connected state;

[0014] If the current difference is greater than the preset current difference, the circuit breaker is switched to the disconnected state.

[0015] Optionally, if the current difference is greater than a preset current difference, the control module is further configured to:

[0016] Output abnormal alarm information, where the abnormal alarm information is used to indicate that the first Hall sensor and / or the second Hall sensor is damaged.

[0017] Optionally, if the current difference is less than or equal to a preset current difference, the control module is further configured to:

[0018] The target current value collected by the target Hall sensor is determined as the current of the main circuit of the battery cluster, and the target Hall sensor is the Hall sensor with higher accuracy between the first Hall sensor and the second Hall sensor.

[0019] Optionally, the control module is also connected to a pre-charging sub-circuit in the main circuit of the battery cluster to control the on-off of the pre-charging sub-circuit.

[0020] Optionally, the high-voltage box control device further includes a DC power conversion module, and the DC power conversion module is connected to the battery cluster main circuit and the control module respectively.

[0021] In a second aspect, the present application provides a high-voltage box control method, which is applied to a control module in the high-voltage box control device of the first aspect, comprising:

[0022] Acquire a first current value of a battery cluster main circuit of the high-voltage box collected by a first Hall sensor, and a second current value of a battery cluster main circuit collected by a second Hall sensor;

[0023] The high voltage box is turned on and off according to the first current value and the second current value.

[0024] Optionally, performing an on-off operation on the high-voltage box according to the first current value and the second current value includes:

[0025] Calculate a current difference between the first current value and the second current value;

[0026] If the current difference is less than or equal to the preset current difference, the circuit breaker in the main circuit of the control battery cluster is in a connected state;

[0027] If the current difference is greater than the preset current difference, the circuit breaker is switched to the disconnected state.

[0028] Optionally, if the current difference is greater than a preset current difference, the method further includes:

[0029] Output abnormal alarm information, where the abnormal alarm information is used to indicate that the first Hall sensor and / or the second Hall sensor is damaged.

[0030] Optionally, if the current difference is less than or equal to a preset current difference, the control module is further configured to:

[0031] The target current value corresponding to the target Hall sensor is determined as the current of the main circuit of the battery cluster, and the target Hall sensor is the Hall sensor with higher accuracy between the first Hall sensor and the second Hall sensor.

[0032] The high-voltage box control device and method provided in the present application include a first Hall sensor, a second Hall sensor and a control module; the first Hall sensor is respectively connected to the control module and the battery cluster main circuit of the high-voltage box, and is used to send the collected first current value of the battery cluster main circuit to the control module; the second Hall sensor is respectively connected to the control module and the battery cluster main circuit, and is used to send the collected second current value of the battery cluster main circuit to the control module; the control module is used to perform on-off operations on the high-voltage box according to the first current value and the second current value. This technical solution sets two Hall sensors and a control module to respectively collect the current of the battery cluster main circuit in the high-voltage box, and calculates the current difference between the two sets of current values ​​through the control module, determines the working state of the Hall sensor, and then sets the corresponding control instructions to control the on-off of the high-voltage box, thereby realizing effective detection of the Hall sensor, reducing the problem of high-voltage box damage caused by inaccurate current collection, and improving the operating safety of the high-voltage box circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0034] Figure 1 A schematic diagram of the structure of a high-voltage box control device provided in an embodiment of the present application;

[0035] Figure 2 Another structural schematic diagram of the high-voltage box control device provided in an embodiment of the present application;

[0036] Figure 3 A schematic flow chart of a high voltage box control method provided in an embodiment of the present application.

[0037] Reference numerals:

[0038] 100-high voltage box control device;

[0039] 110-main positive circuit; 111-first fuse; 112-main positive relay;

[0040] 120-main negative circuit; 121-second fuse; 122-first Hall sensor; 123-main negative relay; 124-second Hall sensor;

[0041] 130-pre-charging sub-circuit; 131-pre-charging resistor; 132-pre-charging relay;

[0042] 140-circuit breaker;

[0043] 150-control module;

[0044] 160-DC power conversion module.

[0045] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0046] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0047] In the prior art, when collecting current from the main electrical circuit of the high-voltage box, a single shunt or a single Hall sensor is usually used to collect the current of the battery cluster in the high-voltage box. However, once the Hall sensor or the shunt fails, the reliability of current collection cannot be guaranteed, and the high-voltage box cannot be turned on and off in real time according to the Hall sensor or the shunt, and the working state of the high-voltage box cannot be effectively adjusted to adapt to the real-time operating conditions of the battery cluster.

[0048] In response to the above technical problems, the inventors realized that a single sensor cannot provide accurate current data when facing component failure, and cannot provide efficient and reliable control instructions to ensure the operation of the system. Based on this, the inventors considered designing a dual current value acquisition solution based on in-depth analysis and research on the above technical problems, providing a cross-verification method through the dual current values ​​collected, and autonomously generating corresponding control instructions based on the dual current values ​​collected to perform the on-off operation of the high-voltage box, so as to achieve rapid response of the system and avoid problems such as damage to the high-voltage box caused by abnormal current.

[0049] The technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems are described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0050] Figure 1 This is a schematic diagram of the structure of the high-voltage box control device provided in the embodiment of the present application. Figure 1 As shown, the high voltage box control device 100 includes:

[0051] A first Hall sensor 122, a second Hall sensor 124 and a control module 150;

[0052] The first Hall sensor 122 is connected to the control module 150 and the battery cluster main circuit of the high-voltage box respectively, and is used to send the collected first current value of the battery cluster main circuit to the control module 150;

[0053] The second Hall sensor 124 is connected to the control module 150 and the main circuit of the battery cluster respectively, and is used to send the collected second current value of the main circuit of the battery cluster to the control module 150;

[0054] The control module 150 is used to perform an on-off operation on the high voltage box according to the first current value and the second current value.

[0055] Among them, the high-voltage box can refer to a high-voltage junction box or a high-voltage distribution box, which is a key component used in energy storage systems. The high-voltage box can manage the high voltage emitted from the battery energy storage system to ensure that the voltage operates within a safe range and prevent the voltage from being too high or too low, thereby protecting the battery cluster and other electrical components in the energy storage system.

[0056] The Hall current sensor is a sensor made based on the Hall effect. It can be used to detect and measure the current in the circuit, which is convenient for monitoring the operation of the energy storage system and ensuring the normal operation of the system. Through the Hall sensor, the current changes in the energy storage battery cluster can also be monitored in real time, so as to timely detect abnormal conditions (such as overload, short circuit, etc.) during the charging and discharging process of the system and take corresponding measures for protection.

[0057] The control module 150 is used to receive current data from two Hall sensors. The control module 150 has a built-in algorithm to compare the two current values ​​and instruct the high-voltage box to perform on-off operations based on the current difference obtained by comparison to protect the system from possible damage caused by current overload or short circuit.

[0058] Figure 2 Another structural schematic diagram of the high voltage box control device provided in the embodiment of the present application. Figure 2 As shown, the main circuit of the battery cluster mainly includes a main positive circuit 110 and a main negative circuit 120. The main positive circuit 110 includes a first fuse 111 and a main positive relay 112. The main negative circuit 120 includes a second fuse 121, a first Hall current sensor 122, a main negative relay 123, and a second Hall current sensor 124.

[0059] Among them, the relay mainly plays the role of controlling the on and off of the circuit and safety protection in the circuit; the fuse is mainly used to cut off the circuit by its own fusing when the circuit is short-circuited to protect the components from damage; the circuit breaker 140 is mainly used to switch on and off the load circuit and cut off the fault circuit to prevent the accident from expanding and ensure safety. It has the functions of short-circuit and overload protection.

[0060] Optionally, the control module 150 is specifically configured to:

[0061] Calculate a current difference between the first current value and the second current value;

[0062] If the current difference is less than or equal to the preset current difference, the circuit breaker 140 in the main circuit of the battery cluster is controlled to be in a connected state;

[0063] If the current difference is greater than the preset current difference, the circuit breaker 140 is switched to an open state.

[0064] Among them, the preset current difference is pre-set according to the system design safety standard, and is used to define the normal fluctuation range of the current reading; specifically, the control module 150 first receives the current value from the first Hall sensor 122 and the second Hall sensor 124, and the processor built into the control module 150 compares the two current values, calculates the difference between them, and obtains the current difference; then the control module 150 compares the calculated current difference with the preset current difference. If the current difference is greater than the preset current difference, the control module 150 determines that there is an abnormality, which may be due to a fault in the Hall sensor causing the current detection to be abnormal. At this time, in order to prevent potential equipment damage, the control module 150 will send a signal to instruct the circuit breaker 140 to switch to the disconnected state, and then control the disconnection of the main positive relay 112 and the main negative relay 123, so that the power supply can be interrupted immediately to prevent further development of the accident.

[0065] Optionally, if the current difference is greater than a preset current difference, the control module 150 is further configured to:

[0066] Output abnormal alarm information, where the abnormal alarm information is used to indicate that the first Hall sensor 122 and / or the second Hall sensor 124 is damaged.

[0067] Among them, while determining that the current difference is abnormal, the control module 150 starts its alarm output function, specifically, generates specific abnormal alarm information, which is used to explain in detail the nature of the abnormality and the equipment that may be involved, such as indicating that "the first Hall sensor 122 may be damaged" or "the second Hall sensor 124 reading is abnormal"; in addition, in an achievable manner, the abnormal alarm information can be conveyed to the system operator or maintenance team in a variety of ways, including but not limited to visual or sound alarms, electronic messages sent to the central monitoring system, or directly displayed on the control panel.

[0068] Optionally, if the current difference is less than or equal to a preset current difference, the control module 150 is further configured to:

[0069] The target current value collected by the target Hall sensor is determined as the current of the main circuit of the battery cluster. The target Hall sensor is the Hall sensor with higher accuracy between the first Hall sensor 122 and the second Hall sensor 124 .

[0070] Among them, if the current value comparison result indicates that the current difference is less than the preset current difference, it is determined that the circuit is currently operating normally without overload or short circuit. In this case, the control module 150 sends an instruction to the circuit breaker 140 to keep it in a connected state and allow current to flow normally. In addition, in this case, the control module 150 needs to further analyze the accuracy of the two Hall sensors and identify the sensor with higher accuracy. In one feasible method, the first Hall sensor 122 is a high-precision CAN (Controller Area Network) Hall sensor, which is generally considered to have higher accuracy than the second Hall sensor 124. The control module 150 determines the current value collected by the first Hall sensor 122 (high-precision sensor) as the actual current value of the main circuit of the battery cluster, because the data provided by the high-precision sensor is more reliable and accurate, and is more suitable as a benchmark for system operation. For example, the first Hall sensor 122 can be a high-precision CAN Hall sensor 122, and the second Hall sensor 124 can be an ordinary Hall sensor. The high-precision CAN Hall sensor 122 can communicate with the battery management system main control unit through CAN_H and CAN_L to upload the collected main circuit current information, and the ordinary Hall sensor can communicate with the battery management system main control unit through HALL_1 and HALL_2.

[0071] Optionally, the control module 150 is also connected to the pre-charging sub-circuit 130 in the main circuit of the battery cluster to control the on and off of the pre-charging sub-circuit 130 .

[0072] Among them, the pre-charging sub-circuit 130 is arranged before the battery cluster is connected to the main power supply or the load, and the battery cluster is pre-charged first to prevent damage caused by voltage mutation when the battery cluster is directly connected. The pre-charging sub-circuit 130 includes a pre-charging resistor 131 and a pre-charging relay 132. The pre-charging resistor 131 is mainly used to limit the current. The voltage of the battery cluster is adjusted through the pre-charging sub-circuit 130. At the same time, due to the existence of the pre-charging resistor 131, excessive circulation between the battery clusters is avoided.

[0073] Specifically, before the battery cluster needs to be connected to the main power supply or load, the control module 150 determines the degree of matching between the voltage of the battery cluster and the system voltage. If the voltage difference is greater than the safety threshold, the control module 150 will instruct the pre-charging relay 132 to close and start the pre-charging process. During the pre-charging process, the current slowly increases through the pre-charging resistor 131 until the voltage of the battery cluster gradually approaches the system voltage. At the same time, the control module 150 continuously monitors the voltage changes and instructs the pre-charging relay 132 to disconnect when the voltage reaches the preset level to complete the pre-charging process.

[0074] Optionally, the high voltage box control device 100 further includes a DC power conversion module 160 , and the DC power conversion module 160 is connected to the battery cluster main circuit and the control module 150 , respectively.

[0075] Among them, the main function of the DC power conversion module 160 is to convert the higher voltage current from the main circuit of the battery cluster into a lower voltage suitable for the control module 150 and other low-voltage devices. It usually involves converting high-voltage direct current (such as 1500VDC) into a lower voltage (such as 24VDC or 12VDC). This conversion ensures that the control module 150 and other sensitive electronic equipment can operate at a safe and appropriate voltage level, thereby avoiding damage caused by excessive voltage.

[0076] Specifically, the DC power conversion module 160 is directly connected to the main circuit of the battery cluster and obtains the required input power from the battery cluster, thereby ensuring that the module can directly draw electrical energy from the main circuit of the battery cluster for conversion; at the same time, the output end of the conversion module is connected to the control module 150, providing a stable and reliable power supply to the control module 150, so that it can continuously and effectively perform its functions; in addition, in an achievable manner, the operating status of the DC power conversion module 160 can be monitored by the control module 150 to ensure that all electrical components are operating within preset voltage and current parameters.

[0077] The high-voltage box control device 100 provided in the embodiment of the present application significantly improves the accuracy of current monitoring and the responsiveness of the system by integrating a dual Hall sensor system and an advanced control module 150. It uses a high-precision Hall sensor and a common precision sensor for current detection, and determines the current difference by comparing the current values ​​of the two. As a result, the control module 150 can select the data of the high-precision sensor as the accurate current value of the main circuit of the battery cluster within a safe range of the current difference, thereby effectively improving the efficiency, safety and reliability of the entire system, and is suitable for a storage system environment with demanding requirements.

[0078] Figure 3 This is a flow chart of the high voltage box control method provided in the embodiment of the present application. Figure 3 As shown, this method is applied to Figure 1The control module 150 in the high voltage box control device 100 shown includes:

[0079] S201 , obtaining a first current value of a main circuit of a battery cluster of a high voltage box collected by a first Hall sensor 122 , and a second current value of a main circuit of the battery cluster collected by a second Hall sensor 124 .

[0080] Among them, the first Hall sensor 122 and the second Hall sensor 124 include a high-precision CAN Hall sensor and an ordinary Hall sensor, each of which is connected to the control module 150 and can be connected by wire; specifically, the first Hall sensor 122 and the second Hall sensor 124 are respectively connected to the main circuit of the battery cluster of the high-voltage box for real-time monitoring of the current condition; in addition, the Hall sensor works based on the Hall effect, that is, when a charged conductor (such as a wire) is placed in a magnetic field, the charge in the conductor will be offset by the Lorentz force, thereby forming a Hall voltage in the transverse direction of the conductor, and this voltage is proportional to the current passing through the conductor, that is, in the high-voltage box control device 100, the Hall sensor is placed near the main positive circuit 110 and the main negative circuit 120, and does not directly contact the wire. The Hall chip will generate a corresponding Hall voltage according to the induced magnetic field strength. This voltage is a direct representation of the current size, that is, the first current value and the second current value in the embodiment of the present application.

[0081] S202: Perform an on-off operation on the high-voltage box according to the first current value and the second current value.

[0082] Among them, the control module 150 first receives the first current value and the second current value, and then detects whether there is a current anomaly in the high-voltage box circuit by comparing the two values; in addition, it should be noted that before performing any on-off operation, the control module 150 will perform multiple checks to confirm that all safety protocols are followed to ensure the safety of the operation; among them, the control module 150 can monitor the operating status of the system in real time based on the current data received from the Hall sensor to ensure that the current operates within a safe range, and respond quickly to any abnormal situation, such as adjusting the load, disconnecting the circuit, etc., to ensure the safe and stable operation of the system.

[0083] Optionally, performing an on-off operation on the high-voltage box according to the first current value and the second current value includes:

[0084] Calculate a current difference between the first current value and the second current value;

[0085] If the current difference is less than or equal to the preset current difference, the circuit breaker 140 in the main circuit of the battery cluster is controlled to be in a connected state;

[0086] If the current difference is greater than the preset current difference, the circuit breaker 140 is switched to an open state.

[0087] The control module 150 receives the first current value and the second current value in the main circuit of the battery cluster from the first Hall sensor 122 and the second Hall sensor 124, and then calculates the difference between the two current values ​​to obtain the current difference value; then compares the current difference value with the preset current difference threshold value to determine whether the current state is normal, wherein the preset current difference threshold value is mainly determined based on system design and safety requirements; for example, when the preset current difference threshold value is 20A, when the current difference sampled by the two Hall sensors is within the allowable range, it is determined that the Hall current sensor is working normally, and the sampling value of the high-precision CAN Hall sensor is used as the output value. This method can ensure the accuracy of the current collection of the energy storage battery cluster through verification, and when the current difference detected by the two Hall sensors is too large, exceeding the set value of 20A, it is determined that the Hall current sensor is working abnormally, and a Hall current sensor abnormality alarm is issued, and the high-voltage box circuit breaker 140 is cut off, and then the main positive relay 112 and the main negative relay 123 are cut off, thereby realizing the fault detection of the Hall sensor and ensuring the safe and reliable operation of the energy storage system. Specifically, when a current abnormality is detected, the control module 150 will control the disconnection of the circuit breaker 140, cut off the current supply of the main positive circuit 110 and the main negative circuit 120, and then cut off the main positive relay 112 and the main negative relay 123, so as to further prevent the expansion of the fault and protect the battery and other key equipment from damage; in addition, it should be noted that when the high-voltage box needs to be shut down or enter the maintenance mode under normal operation, the control module 150 will first control the system to reduce power and gradually reduce the current in the high-voltage box. After the current drops to zero, the main positive relay 112 and the main negative relay 123 will be disconnected, and the high-voltage box circuit will be safely placed in an inactive state. When all currents are completely disconnected, the control module 150 will perform a status check to confirm that all electrical components have been safely disconnected to ensure that there is no residual current or voltage.

[0088] Optionally, if the current difference is greater than a preset current difference, the method further includes:

[0089] Output abnormal alarm information, where the abnormal alarm information is used to indicate that the first Hall sensor 122 and / or the second Hall sensor 124 is damaged.

[0090] Among them, when the calculated current difference exceeds the preset threshold, the control module 150 triggers the safety response process. Specifically, the current difference is abnormal, which may indicate that one or both sensors are damaged or there is a measurement error. At this time, the control module 150 will generate abnormal alarm information. This information specifically indicates possible fault conditions, such as "the first Hall sensor 122 may be damaged" or "the second Hall sensor 124 measures abnormally". Once the abnormal alarm information is output, the system may take further protective measures, including but not limited to immediately disconnecting the power supply to protect the system from further damage; in addition, after a fault occurs, the system will record all associated event data, including current value, alarm time, response measures, etc., in the system log for subsequent analysis and fault diagnosis.

[0091] Optionally, if the current difference is less than or equal to a preset current difference, the control module 150 is further configured to:

[0092] The target current value corresponding to the target Hall sensor is determined as the current of the main circuit of the battery cluster. The target Hall sensor is the Hall sensor with higher accuracy between the first Hall sensor 122 and the second Hall sensor 124 .

[0093] Among them, the target Hall sensor is a high-precision sensor. The high-precision CAN Hall sensor communicates with the control module 150 through the CAN bus, and the ordinary Hall sensor communicates with the control module 150 through a simple analog or digital signal interface, such as HALL_1 and HALL_2; in a feasible manner, the current data is sent to the control module 150 in real time through a preset communication interface. After receiving these data, the control module 150 performs further analysis and processing, such as current monitoring, fault detection and system control.

[0094] The high-voltage box control method provided in the embodiment of the present application provides an efficient and safe way to manage the current state of the battery cluster through precise current monitoring and intelligent on-off operations, ensuring that the control module can respond quickly based on real-time data, thereby protecting the battery and system safety while maintaining efficient operation of the system, significantly improving the reliability of the high-voltage box and the overall safety of the system.

[0095] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the invention disclosed herein. The present application is intended to cover any modification, use or adaptation of the present application, which follows the general principles of the present application and includes common knowledge or customary techniques in the art that are not disclosed in the present application. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present application are indicated by the following claims.

[0096] It should be noted that, for the aforementioned method embodiments, for the sake of simplicity, they are all expressed as a series of action combinations, but those skilled in the art should be aware that the present application is not limited by the described order of actions, because according to the present application, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all optional embodiments, and the actions and modules involved are not necessarily required by the present application.

[0097] In the above embodiments, the description of each embodiment has its own emphasis. For parts not described in detail in a certain embodiment, please refer to the relevant description of other embodiments. The technical features of the above embodiments can be combined arbitrarily. In order to make the description concise, all possible combinations of the technical features in the above embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0098] It should be understood that the present application is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A high voltage box control device, characterized in that: include: A first Hall sensor, a second Hall sensor and a control module; The first Hall sensor is connected to the control module and the battery cluster main circuit of the high-voltage box respectively, and is used to send the collected first current value of the battery cluster main circuit to the control module; The second Hall sensor is connected to the control module and the battery cluster main circuit respectively, and is used to send the collected second current value of the battery cluster main circuit to the control module; The control module is used to perform an on-off operation on the high-voltage box according to the first current value and the second current value.

2. The device according to claim 1, characterized in that The control module is specifically used for: calculating a current difference between the first current value and the second current value; If the current difference is less than or equal to a preset current difference, controlling the circuit breaker in the main circuit of the battery cluster to be in a connected state; If the current difference is greater than the preset current difference, the circuit breaker is switched to an open state.

3. The device according to claim 2, characterized in that If the current difference is greater than the preset current difference, the control module is further configured to: Output abnormal alarm information, where the abnormal alarm information is used to indicate that the first Hall sensor and / or the second Hall sensor is damaged.

4. The device according to claim 2 or 3, characterized in that If the current difference is less than or equal to the preset current difference, the control module is further configured to: The target current value collected by the target Hall sensor is determined as the current of the main circuit of the battery cluster, and the target Hall sensor is a Hall sensor with higher accuracy between the first Hall sensor and the second Hall sensor.

5. The device according to claim 2 or 3, characterized in that: The control module is also connected to the pre-charging sub-circuit in the main circuit of the battery cluster to control the on and off of the pre-charging sub-circuit.

6. The device according to any one of claims 1 to 3, characterized in that: The high voltage box control device further comprises a DC power conversion module, and the DC power conversion module is respectively connected to the battery cluster main circuit and the control module.

7. A high voltage box control method, characterized in that: A control module applied to a high-voltage box control device according to any one of claims 1 to 6, the method comprising: Acquire a first current value of a battery cluster main circuit of a high-voltage box collected by a first Hall sensor, and a second current value of the battery cluster main circuit collected by a second Hall sensor; The high voltage box is turned on and off according to the first current value and the second current value.

8. The method according to claim 7, characterized in that The performing an on-off operation on the high voltage box according to the first current value and the second current value includes: calculating a current difference between the first current value and the second current value; If the current difference is less than or equal to a preset current difference, controlling the circuit breaker in the main circuit of the battery cluster to be in a connected state; If the current difference is greater than the preset current difference, the circuit breaker is switched to an open state.

9. The method according to claim 8, characterized in that If the current difference is greater than the preset current difference, the method further includes: Output abnormal alarm information, where the abnormal alarm information is used to indicate that the first Hall sensor and / or the second Hall sensor is damaged.

10. The method according to claim 8 or 9, characterized in that: If the current difference is less than or equal to a preset current difference, the control module is further configured to: The target current value corresponding to the target Hall sensor is determined as the current of the main circuit of the battery cluster, and the target Hall sensor is a Hall sensor with higher accuracy between the first Hall sensor and the second Hall sensor.

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